Hi, please excuse the tirade of posts and I hope this is appropriate and in the right section/forum, I have a Daikin 8kW EDLA08E2V3 installed by Octopus, we are really happy with the install with a full re-pipe mostly 28mm, down to 22mm with 15mm radiator connections, 80% new radiators (K2’s and K3’s) with a design temp of 45, the only gripe is the lack of configuration from Octopus of the MMI and the Daikin User Guide is awful.
The house has been really comfortable with a room temp set to 20 (24/7 schedule) and 18 upstairs, downstairs is basically open loop (with TADO open, but the living room would turn down if we had the log burner on) and upstairs I use TADO TRV’s to maintain temps.
I have just successfully set up the ESPAltherma, thanks to the community for the help and pointers.
Now I can monitor the COP while appreciating the inaccuracy of the Daikin sensors, at least I have a baseline to make changes and compare.
My COP appears to be amazing well over 4 when I have a WD curve 32 @ 15 and 38 @ -3 and a modulation of 10, but I am seeing power fluctuations and COP variances when the system ticks over past the initial boost.
This morning, I have just changed the modulation to 2 and the COP is even better with a higher flow temp, however the system has now reached the room temp and turned off, I will have to see the cycling effects, however the house was basically almost up to temp as I made the modulation change.
I am keen on a set and forget ECO scenario (good enough, not perfect) - using the Madoka and WD, I would just like to dial it in a little.
My ASK -
Can others share their weather-dependent curve and modulation settings so I can make a few tweaks and see the results?
Many thanks Neil
PS we have a 200-year-old 4 bed Semi-detached house with a 10-year-old extension and an EPC rating of A (internal wall insulation in the old part of the house).
Yesterday’s Power Draw and flow rates with a modulation of 10, you can see the startup peak and the fluctuating values, I guess to keep the DT of 5?
I have also used the following as a starting for 10 but noted the comments from a heat geek elite installer about modulation, hence I have just moved to ‘2’.